i recently bought OBDLink SX with obdwiz software and tried it on a couple of different vehicles and its not working on few like chevrolet epica 2007 and camry 2006. its working fine on chevrolet trailblazer 2005 and honda accord 2006.

kindly tell me a work around to get it working on my chevrolet epica 2007. i got my car tested from the dealer and it was connected to their handheld OBD II scanner and worked fine.

do i have to install some additional module or drivers for this car or there is something else ?

Could you create a log for the Epica? To create a log, launch OBDwiz and go to Diagnostics->Raw Data and click "Always Collect" if there is not a green check mark next to it, then connect. Copy/paste the data into your next post.

its connected now and working fine. few thing its not showing i.e oxygen sensors data and few other tabs. also i want to know what does the attached snapshot means ? its showing warning that this vehicle is not ready for emissions testing? kindly tell in detail what does that mean and how to fix these issues.

In the posted screen shot, your vehicle is reporting that several of your readiness monitors are not complete. This can mean that some of your emissions related systems are not functioning within spec. Unfortunately, we can not offer repair advice on this forum.

The monitors simply tell you that the ECU has not seen specific conditions that it determines is normal for each system under test. In your case, it generically means that the ECU has not yet determined if the Catalytic converter, Oxygen sensor, Oxygen sensor Heater (built into the oxygen sensor) and EGR systems are functioning correctly. Replacing all those parts may or may not cause the monitor to complete depending on what exactly is wrong. You will need to inspect the EGR Valve, Catalytic Converter and oxygen sensor(s) for proper operation.

If I was going to test each of these I would:

EGR Valve Actuate the EGR valve at idle momentary. While the valve is open the engine idle should be rough.

Oxygen Sensor HeaterMeasure if voltage is being supplied to the heater element(s) and also measure the resistance of the heater element.

Oxygen SensorGraph the sensor; it should have a sinusoid like shape.

Catalyst Drive the vehicle for several miles on the freeway. Then use a non-contact thermal scanner to measure the temperature of the catalyst and the pipes connected to it. The catalyst should be at a considerably higher temperature.

Please understand that I can't make any guarantees of success for these tests. There are based on my limited understanding of your vehicle as well as your technical ability.